摘要
在弱碱性(pH10)介质中桂皮酸盐可以增加Ag^(+)-H_(2)QS-K_(2)S_(2)O_(8)体系的荧光强度。其最大激发和发射波长分别为325nm和420nm,当Ag^(+)浓度在2~40μgL^(-1)范围内时,荧光强度与之成良好的线性关系。共存重金属离子的影响可用EDTA型阴离子交换柱除去。据此拟定的分析程序用于废水分析结果良好。
The fluorescence of the Ag^(+)-H_(2)QS-K_(2)S_(2)O_(8) system was greatly enhanced by cinnamic acid in the solution of pH 10. The excitation maximum occured at 325nm with fluorescence occurred at 420nm.The sensitivity of this reaction is eight-fold higher than that of the reaction in an acid medium(pH1.5-3.5) without the cinnamic acid and the detection limit was found to be 2.0 μg/L. The influece of foreign ions can be eliminatied by ion exchange separation by using a column of anion exchanger of EDTA type.
作者
郭雅先
俞世荣
魏庆询
孙书菊
Guo Yaxian;Yu Shirong;Wei Qingxun;Sun Shuju(Department of Chemistry,Jilin University,Changchun)
出处
《高等学校化学学报》
SCIE
EI
CAS
1988年第8期786-789,共4页
Chemical Journal of Chinese Universities
关键词
荧光增敏
荧光光度测定
银的测定
Fluoremetry effect
Fluorescence enhanced
Determination of silver
